毒性
GRAS(FEMA)。
使用限量
FEMA(mg/kg):糖果、焙烤食品,2.0;软饮料、冷饮、胶冻、布丁、肉制品、肉羹汤,1.0。
食品添加剂最大允许使用量及最大允许残留量标准
化学性质
无色液体,具有蘑菇和大蒜般的香气。沸点84℃(1600Pa)。
用途
根据GB 2760--1996规定为暂时允许使用的食品用香料。
生产方法
由异丙叉丙酮与二甲硫醚加成而成,或由丙酮与甲基双甲硫基铝反应而得。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-甲基-4-(甲基磺酰基)-2-戊酮 | 4-methanesulfonyl-4-methyl-pentan-2-one | 68152-40-9 | C7H14O3S | 178.252 |
The preparation of ((CH3)2CHS)2AlCH3 and (t-CaH9S)2AlCH3 is reported. The reactions of (RS)2AlCH3 (R = CH3, (CH3)2CH, t-C4H9) with ketones give aldol condensations leading to the corresponding conjugated ketones, with the acetyl group R—CO—CH3; with other ketones, a mixture of thioacetal and enolthioether is obtained. With aldehydes, a mixture of thioacetal and enolthioether is observed. With olefins there is an addition of two RS groups on the site of the double bond, with a small percentage of allylic substitution. With conjugated ketone, the saturated ketone is obtained with the alkylthio group in β position. All those reactions proceed with good yields and appear quite general.